[APD] 0 KH

[Barry Anderberg <apd at swoobs_org>]

Some of you may have seen posts on AquaticPlantCentral where some people 
are deliberately using unbuffered water for their planted aquariums.

http://www.aquaticplantcentral.com/forumapc/science-of-fertilizing/27522-low-kh-and-ph-crash.html

I know some experienced aquarists read the APD so I thought I would see 
what the general opinion on this unconventional approach to our hobby is.

Apparently a number of people are successfully keeping both fish and 
plants in water with no buffer at all.  The claim seems to be that CO2 
in unbuffered water yields a consistent pH of around 5.0.

What do you all think?
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